Recently Noticed the DHCP ip provided from Xfinity is 10.0.x.x

I noticed that my DHCP IP address from Xfinity is now 10.0.0.x, which used to be 172.x.x.x and/or 54.x.x.x. Is this a new range of IPs that Xfinity is adding new, or am I just noticing it now? I work from home and just want to make sure.

Responses

XfinityAmandaB

Official Employee

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2K Messages

10 months ago

user_g0o3w4 Thank you for asking about the new IP you have noticed. We do provide a dynamic IP address and not a static IP. Dynamic IP addresses aren't permanent. Yours won't change often, but sometimes, due to system maintenance, you'll get a short-term DHCP lease. A short-term DHCP lease is a temporary IP address that expires after a set amount of time. A device that's set up correctly will auto renew the DHCP lease.

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BruceW

Gold Problem Solver

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26.3K Messages

9 months ago

I noticed that my DHCP IP address from Xfinity is now 10.0.0.x ...

That's the usual address range assigned to devices connected to a Comcast gateway, but all 10.*.*.* addresses are private IPs (see https://en.wikipedia.org/wiki/Private_network#Private_IPv4_addresses), not public ones. We have seen a few customers post that their gateway WAN ports have been given a private IP in the range 10.x.*.*, where x is a number greater than 1. Those appear to be some sort of carrier-level NAT, although Comcast has never commented on this AFAICT.

The first Comcast hop in a traceroute is sometimes in this range as well (see, for example, the second hop in https://forums.xfinity.com/conversations/your-home-network/packet-loss/666b057d1e56d61567fac9e9).

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Your Home Network

user_g0o3w4

Recently Noticed the DHCP ip provided from Xfinity is 10.0.x.x

XfinityAmandaB

BruceW

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

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